Enable some frozen string in ee/app

Enables frozen string in the following:

* ee/app/policies/**/*.rb
* ee/app/presenters/**/*.rb
* ee/app/serializers/**/*.rb
* ee/app/services/**/*.rb
* ee/app/uploaders/**/*.rb
* ee/app/validators/**/*.rb
* ee/app/workers/**/*.rb

Partially addresses gitlab-org/gitlab-ce/#47424.

ee/app/controllers/concerns/ee/boards_responses.rb

+# frozen_string_literal: true
+
 module EE
   module BoardsResponses
     extend ActiveSupport::Concern

ee/app/policies/ee/base_policy.rb

+# frozen_string_literal: true
+
 module EE
   module BasePolicy
     extend ActiveSupport::Concern

ee/app/policies/ee/group_policy.rb

+# frozen_string_literal: true
+
 module EE
   module GroupPolicy
     extend ActiveSupport::Concern

ee/app/policies/ee/merge_request_policy.rb

+# frozen_string_literal: true
+
 module EE
   module MergeRequestPolicy
     extend ActiveSupport::Concern

ee/app/policies/ee/project_policy.rb

+# frozen_string_literal: true
+
 module EE
   module ProjectPolicy
     extend ActiveSupport::Concern

ee/app/policies/ee/protected_branch_policy.rb

+# frozen_string_literal: true
+
 module EE
   module ProtectedBranchPolicy
     extend ActiveSupport::Concern

ee/app/policies/epic_policy.rb

+# frozen_string_literal: true
+
 class EpicPolicy < BasePolicy
   delegate { @subject.group }
 

ee/app/policies/saml_provider_policy.rb

+# frozen_string_literal: true
+
 class SamlProviderPolicy < BasePolicy
   rule { ~anonymous }.enable :sign_in_with_saml_provider
 end

ee/app/presenters/audit_event_presenter.rb

+# frozen_string_literal: true
+
 class AuditEventPresenter < Gitlab::View::Presenter::Simple
   presents :audit_event
 

ee/app/presenters/ee/ci/pipeline_presenter.rb

+# frozen_string_literal: true
+
 module EE
   module Ci
     module PipelinePresenter

ee/app/presenters/ee/group_member_presenter.rb

+# frozen_string_literal: true
+
 module EE
   module GroupMemberPresenter
     def group_sso?

ee/app/presenters/ee/member_presenter.rb

+# frozen_string_literal: true
+
 module EE
   module MemberPresenter
     def can_update?

ee/app/presenters/ee/merge_request_presenter.rb

+# frozen_string_literal: true
+
 module EE
   module MergeRequestPresenter
     include ::VisibleApprovable

ee/app/presenters/ee/project_member_presenter.rb

+# frozen_string_literal: true
+
 module EE
   module ProjectMemberPresenter
     def group_sso?

ee/app/serializers/ee/environment_entity.rb

+# frozen_string_literal: true
+
 module EE
   module EnvironmentEntity
     extend ActiveSupport::Concern

ee/app/serializers/ee/issuable_sidebar_entity.rb

+# frozen_string_literal: true
+
 module EE
   module IssuableSidebarEntity
     extend ActiveSupport::Concern

ee/app/serializers/ee/issue_sidebar_entity.rb

+# frozen_string_literal: true
+
 module EE
   module IssueSidebarEntity
     extend ActiveSupport::Concern

ee/app/serializers/ee/merge_request_widget_entity.rb

+# frozen_string_literal: true
+
 module EE
   module MergeRequestWidgetEntity
     include ::API::Helpers::RelatedResourcesHelpers

ee/app/serializers/ee/project_mirror_entity.rb

+# frozen_string_literal: true
+
 module EE
   module ProjectMirrorEntity
     extend ActiveSupport::Concern

ee/app/serializers/ee/variable_entity.rb

+# frozen_string_literal: true
+
 module EE
   module VariableEntity
     extend ActiveSupport::Concern

ee/app/serializers/epic_base_entity.rb

+# frozen_string_literal: true
+
 class EpicBaseEntity < Grape::Entity
   include RequestAwareEntity
   include EntityDateHelper

ee/app/serializers/epic_entity.rb

+# frozen_string_literal: true
+
 class EpicEntity < IssuableEntity
   expose :group_id
   expose :group_name do |epic|

ee/app/serializers/epic_note_entity.rb

+# frozen_string_literal: true
+
 class EpicNoteEntity < NoteEntity
   expose :toggle_award_path, if: -> (note, _) { note.emoji_awardable? } do |note|
     toggle_award_emoji_group_epic_note_path(note.noteable.group, note.noteable, note)

ee/app/serializers/epic_note_serializer.rb

+# frozen_string_literal: true
+
 class EpicNoteSerializer < BaseSerializer
   entity EpicNoteEntity
 end

ee/app/serializers/epic_serializer.rb

+# frozen_string_literal: true
+
 class EpicSerializer < BaseSerializer
   entity EpicEntity
 end

ee/app/serializers/file_lock_entity.rb

+# frozen_string_literal: true
+
 class FileLockEntity < Grape::Entity
   expose :user, using: API::Entities::UserSafe
 end

ee/app/serializers/geo_node_status_serializer.rb

+# frozen_string_literal: true
+
 class GeoNodeStatusSerializer < BaseSerializer
   entity EE::API::Entities::GeoNodeStatus
 end

ee/app/serializers/geo_project_registry_entity.rb

+# frozen_string_literal: true
+
 class GeoProjectRegistryEntity < Grape::Entity
   expose :project_id
   expose :last_repository_synced_at

ee/app/serializers/geo_project_registry_serializer.rb

+# frozen_string_literal: true
+
 class GeoProjectRegistrySerializer < BaseSerializer
   entity GeoProjectRegistryEntity
 end

ee/app/serializers/group_analytics_serializer.rb

+# frozen_string_literal: true
+
 class GroupAnalyticsSerializer < BaseSerializer
   entity UserAnalyticsEntity
 end

ee/app/serializers/milestone_serializer.rb

+# frozen_string_literal: true
+
 class MilestoneSerializer < BaseSerializer
   entity API::Entities::Milestone
 end

ee/app/serializers/namespace_entity.rb

+# frozen_string_literal: true
+
 class NamespaceEntity < Grape::Entity
   expose :id, :name, :path, :kind, :full_path, :parent_id
 end

ee/app/serializers/prometheus_alert_entity.rb

+# frozen_string_literal: true
+
 class PrometheusAlertEntity < Grape::Entity
   include RequestAwareEntity
 

ee/app/serializers/prometheus_alert_serializer.rb

+# frozen_string_literal: true
+
 class PrometheusAlertSerializer < BaseSerializer
   entity PrometheusAlertEntity
 end

ee/app/serializers/prometheus_metric_entity.rb

+# frozen_string_literal: true
+
 class PrometheusMetricEntity < Grape::Entity
   include RequestAwareEntity
 

ee/app/serializers/prometheus_metric_serializer.rb

+# frozen_string_literal: true
+
 class PrometheusMetricSerializer < BaseSerializer
   entity PrometheusMetricEntity
 end

ee/app/serializers/rollout_status_entity.rb

+# frozen_string_literal: true
+
 class RolloutStatusEntity < Grape::Entity
   include RequestAwareEntity
 

ee/app/serializers/storage_shard_entity.rb

+# frozen_string_literal: true
+
 class StorageShardEntity < Grape::Entity
   expose :name
 end

ee/app/serializers/storage_shard_serializer.rb

+# frozen_string_literal: true
+
 class StorageShardSerializer < BaseSerializer
   entity StorageShardEntity
 end

ee/app/serializers/triggered_pipeline_entity.rb

+# frozen_string_literal: true
+
 class TriggeredPipelineEntity < Grape::Entity
   include RequestAwareEntity
 

ee/app/serializers/user_analytics_entity.rb

+# frozen_string_literal: true
+
 class UserAnalyticsEntity < Grape::Entity
   include RequestAwareEntity
 

ee/app/serializers/vulnerabilities/occurrence_serializer.rb

+# frozen_string_literal: true
+
 class Vulnerabilities::OccurrenceSerializer < BaseSerializer
   include WithPagination
 

ee/app/serializers/vulnerability_summary_serializer.rb

+# frozen_string_literal: true
+
 class VulnerabilitySummarySerializer < BaseSerializer
   entity VulnerabilitySummaryEntity
 end

ee/app/services/boards/destroy_service.rb

+# frozen_string_literal: true
+
 module Boards
   class DestroyService < Boards::BaseService
     def execute(board)

ee/app/services/boards/update_service.rb

+# frozen_string_literal: true
+
 module Boards
   class UpdateService < Boards::BaseService
     def execute(board)

ee/app/services/ci_cd/github_integration_setup_service.rb

+# frozen_string_literal: true
+
 module CiCd
   class GithubIntegrationSetupService
     attr_reader :project

ee/app/services/ci_cd/github_setup_service.rb

+# frozen_string_literal: true
+
 module CiCd
   class GithubSetupService
     attr_reader :project

ee/app/services/ci_cd/setup_project.rb

+# frozen_string_literal: true
+
 module CiCd
   class SetupProject < ::BaseService
     def execute

ee/app/services/clear_namespace_shared_runners_minutes_service.rb

+# frozen_string_literal: true
+
 class ClearNamespaceSharedRunnersMinutesService < BaseService
   def initialize(namespace)
     @namespace = namespace

ee/app/services/clusters/applications/check_upgrade_progress_service.rb

+# frozen_string_literal: true
+
 module Clusters
   module Applications
     class CheckUpgradeProgressService < BaseHelmService

ee/app/services/clusters/applications/prometheus_update_service.rb

+# frozen_string_literal: true
+
 module Clusters
   module Applications
     class PrometheusUpdateService < BaseHelmService

ee/app/services/clusters/applications/schedule_update_service.rb

+# frozen_string_literal: true
+
 module Clusters
   module Applications
     class ScheduleUpdateService

ee/app/services/concerns/cleanup_approvers.rb

+# frozen_string_literal: true
+
 # Concern that encapsulates logic to remove all
 # approvers in a project that were not added during
 # the current transaction

ee/app/services/concerns/validates_classification_label.rb

+# frozen_string_literal: true
+
 module ValidatesClassificationLabel
   def validate_classification_label(record, attribute_name)
     return unless EE::Gitlab::ExternalAuthorization.enabled?

ee/app/services/ee/application_settings/update_service.rb

+# frozen_string_literal: true
+
 module EE
   module ApplicationSettings
     module UpdateService

ee/app/services/ee/applications/create_service.rb

+# frozen_string_literal: true
+
 module EE
   module Applications
     # rubocop:disable Gitlab/ModuleWithInstanceVariables

ee/app/services/ee/audit_event_service.rb

+# frozen_string_literal: true
+
 module EE
   module AuditEventService
     # rubocop:disable Gitlab/ModuleWithInstanceVariables

ee/app/services/ee/base_count_service.rb

+# frozen_string_literal: true
+
 module EE
   module BaseCountService
     extend ::Gitlab::Utils::Override

ee/app/services/ee/boards/base_service.rb

+# frozen_string_literal: true
+
 module EE
   module Boards
     module BaseService

ee/app/services/ee/boards/create_service.rb

+# frozen_string_literal: true
+
 module EE
   module Boards
     module CreateService

ee/app/services/ee/boards/issues/create_service.rb

+# frozen_string_literal: true
+
 module EE
   module Boards
     module Issues

ee/app/services/ee/boards/issues/list_service.rb

+# frozen_string_literal: true
+
 module EE
   module Boards
     module Issues

ee/app/services/ee/boards/issues/move_service.rb

+# frozen_string_literal: true
+
 module EE
   module Boards
     module Issues

ee/app/services/ee/boards/list_service.rb

+# frozen_string_literal: true
+
 module EE
   module Boards
     module ListService

ee/app/services/ee/boards/lists/create_service.rb

+# frozen_string_literal: true
+
 module EE
   module Boards
     module Lists

ee/app/services/ee/boards/lists/list_service.rb

+# frozen_string_literal: true
+
 module EE
   module Boards
     module Lists

ee/app/services/ee/ci/register_job_service.rb

+# frozen_string_literal: true
+
 module EE
   module Ci
     # RegisterJobService EE mixin

ee/app/services/ee/clusters/applications/base_helm_service.rb

+# frozen_string_literal: true
+
 module EE
   module Clusters
     module Applications

ee/app/services/ee/clusters/create_service.rb

+# frozen_string_literal: true
+
 module EE
   module Clusters
     module CreateService

ee/app/services/ee/commits/create_service.rb

+# frozen_string_literal: true
+
 module EE
   module Commits
     module CreateService

ee/app/services/ee/emails/base_service.rb

+# frozen_string_literal: true
+
 module EE
   module Emails
     module BaseService

ee/app/services/ee/emails/create_service.rb

+# frozen_string_literal: true
+
 module EE
   module Emails
     module CreateService

ee/app/services/ee/emails/destroy_service.rb

+# frozen_string_literal: true
+
 module EE
   module Emails
     module DestroyService

ee/app/services/ee/groups/create_service.rb

+# frozen_string_literal: true
+
 module EE
   module Groups
     module CreateService

ee/app/services/ee/groups/destroy_service.rb

+# frozen_string_literal: true
+
 module EE
   module Groups
     module DestroyService

ee/app/services/ee/groups/update_service.rb

+# frozen_string_literal: true
+
 module EE
   module Groups
     module UpdateService

ee/app/services/ee/issuable/common_system_notes_service.rb

+# frozen_string_literal: true
+
 module EE
   module Issuable
     module CommonSystemNotesService

ee/app/services/ee/issuable_base_service.rb

+# frozen_string_literal: true
+
 module EE
   module IssuableBaseService
     private

ee/app/services/ee/issues/build_service.rb

+# frozen_string_literal: true
+
 module EE
   module Issues
     module BuildService

ee/app/services/ee/issues/move_service.rb

+# frozen_string_literal: true
+
 module EE
   module Issues
     module MoveService

ee/app/services/ee/keys/create_service.rb

+# frozen_string_literal: true
+
 module EE
   module Keys
     module CreateService

ee/app/services/ee/keys/destroy_service.rb

+# frozen_string_literal: true
+
 module EE
   module Keys
     module DestroyService

ee/app/services/ee/lfs/lock_file_service.rb

+# frozen_string_literal: true
+
 module EE
   module Lfs
     module LockFileService

ee/app/services/ee/lfs/unlock_file_service.rb

+# frozen_string_literal: true
+
 module EE
   module Lfs
     module UnlockFileService

ee/app/services/ee/members/approve_access_request_service.rb

+# frozen_string_literal: true
+
 module EE
   module Members
     module ApproveAccessRequestService

ee/app/services/ee/members/create_service.rb

+# frozen_string_literal: true
+
 module EE
   module Members
     module CreateService

ee/app/services/ee/members/destroy_service.rb

+# frozen_string_literal: true
+
 module EE
   module Members
     module DestroyService

ee/app/services/ee/members/update_service.rb

+# frozen_string_literal: true
+
 module EE
   module Members
     module UpdateService

ee/app/services/ee/merge_requests/base_service.rb

+# frozen_string_literal: true
+
 module EE
   module MergeRequests
     module BaseService

ee/app/services/ee/merge_requests/build_service.rb

+# frozen_string_literal: true
+
 module EE
   module MergeRequests
     module BuildService

ee/app/services/ee/merge_requests/merge_service.rb

+# frozen_string_literal: true
+
 module EE
   module MergeRequests
     module MergeService

ee/app/services/ee/merge_requests/refresh_service.rb

+# frozen_string_literal: true
+
 module EE
   module MergeRequests
     module RefreshService

ee/app/services/ee/merge_requests/update_service.rb

+# frozen_string_literal: true
+
 module EE
   module MergeRequests
     module UpdateService

ee/app/services/ee/milestones/promote_service.rb

+# frozen_string_literal: true
+
 module EE
   module Milestones
     module PromoteService

ee/app/services/ee/notes/build_service.rb

+# frozen_string_literal: true
+
 module EE
   module Notes
     module BuildService

ee/app/services/ee/notification_service.rb

+# frozen_string_literal: true
+
 require 'ee/gitlab/service_desk'
 
 module EE

ee/app/services/ee/projects/create_from_template_service.rb

+# frozen_string_literal: true
+
 module EE
   module Projects
     module CreateFromTemplateService

ee/app/services/ee/projects/create_service.rb

+# frozen_string_literal: true
+
 module EE
   module Projects
     module CreateService

ee/app/services/ee/projects/destroy_service.rb

+# frozen_string_literal: true
+
 module EE
   module Projects
     module DestroyService

ee/app/services/ee/projects/gitlab_projects_import_service.rb

+# frozen_string_literal: true
+
 module EE
   module Projects
     module GitlabProjectsImportService